CVE-2026-7426
High · 8.1CVSS
8.1
EPSS
0.4%
Published
Apr 29, 2026
CISA due date
—
The record
Insufficient validation of the prefix length field in IPv6 Router Advertisement processing in FreeRTOS-Plus-TCP before V4.2.6 and V4.4.1 allows an adjacent network actor to cause memory corruption by sending a crafted Router Advertisement with a prefix length value exceeding the maximum valid length, resulting in a heap buffer overflow. Users processing IPv4 RA only are not impacted. To mitigate this issue, users should upgrade to the fixed version when available.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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